Loop transfer recovery design with proportional integral observer based on HINF optimal observation

Y. X. Yao, Y. M. Zhang, R. Kovacevic

Research output: Contribution to journalConference articlepeer-review

12 Scopus citations


A loop transfer recovery (LTR) design method with a proportional integral (PI) observer is proposed. It is based on the H optimal observation via factorization approach. A general controller structure consisting of a robust linear functional observer and state feedback is used in the feedback control system. A parameterization for all PI observers is given. The interconnection between the optimal LTR problem and H optimal observation problem using PI observer for the given system is shown. Analysis indicates that they are exactly the same. Based on the results of the H optimal observation, the optimal LTR design is solved in the general framework of the H optimization. The proposed method is effective for both minimum phase and non-minimum phase systems. The loop transfer and the disturbance attenuation properties can be recovered simultaneously using this method. A systematic design procedure of optimal LTR based on H optimization is presented.

Original languageEnglish
Pages (from-to)786-790
Number of pages5
JournalProceedings of the American Control Conference
StatePublished - 1997
EventProceedings of the 1997 American Control Conference. Part 3 (of 6) - Albuquerque, NM, USA
Duration: Jun 4 1997Jun 6 1997

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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